Drill bit loosener



Jan- 11, 1949 s. H. MALINAK DRILL BIT LQOSENER Filed Deo. 12, 1945 M m vA M um Y a w ,NM du vm. L- m R. m |l1r|||-\ m m .9 5 w N. mm mm N NN. mw mwkw gwhw ww vm mw Patented Jan. 1l, 1949 UNITED S'ljA'IES PATENT OFFICE f, i L f-.falsassi 'e f v l ymaiali err LokosyENERl Samuel Malinak, Butte, Mont. Application Dec'embeiz, 194:51, serialk No. (334,610

This invention relates to a drill 4kbit loosener, and particularly to a loosener by means of which bits of drills of the type used'in coal mines may be loosened and removed for sharpening.; The

bits of drills used in coal mines and other specific forms of'drills very often become wedged inthe socket of the drill so tightly that it is very difcult to remove them, and Vit is' therefore one object of the invention to pro-vide af device by means of which a drill may be very'rmly held and blows applied to the bit to dislodge itfrom the drill. f

Another object of the invention is to. so form the bit holder that a bitwill be heldinl a horizontal position near the ground -andin such relation toa pivotally mounted dislodgingmember is struck with a Sledge hammer, blows will be delivered to the bitvtransversely `thereof and in such manner that turning movement will be imparted to the bit and the bit worked loose` from the socket of the drill into which it lits, better, faster and safer.

Another object of the invention is to provide the holder with a stationary-jaw and a movable jaw movable toward and away from the stationaryl jaw by means of a member vwhich is shiftable longitudinally by means of an actuating lever, the longitudinally movable member beingliormed with a sloping surface contacting with themovable member so that, as the `movable memberl orbar is shifted longitudinally, the movable jaw=wil Figure 3 is a side view of one of the'jaws for engaging a drill,

Figure 4 is a side view of member, and l Figure 5 is a perspective view of a mounting member for the bit engaging member.

the bit engaging This improved bit vremover is employed rfor: removing bits from drills used in rock ydri-11s: These such as are used in mines and quarries. bits become tightly stuck in the drill after they have been used for some time,.and when a workman attempts to loosen them by striking them with a hammer, it is diilicult todo so and ,inf

addition very often small pieces of:y steelw'ill-:be

broken from a bit and afworkman `willbe'injured.

the accompany# 4 clams. (ol. .299.243)

by a spark or small particle of hot steel lodging tion Iand uses a Sledge hammer while dislodging in his eye. This cannot occur when the improved bit' removeris used, since the bit will be placed in a horizontal position close to rthe ground andithe--iworkman stands in an upright posithe bit'from the drill. y

.-The body.-.portion I of the bitl remover has a base 2 carrying an upstanding web 3, along the upper; edge'of which is a head 4, and upon referi ring to Figures 1 vand 2, it will be seen that the body has the same construction as arailroad railpand,y in fact, `is preferably formed from a portion .of a `discarded railroad rail. The base Zjof `the body is secured upon a thick board 5 f l byfasteners such as spikes 'dit being understood that while `the, `foundation 5 preferably consistsl l o f a board-,l intor` which spikes are driven, it may be formed of metal and bolts or other suitable fasteners used for securing the body l upon it n ear one end. A portion of the head l is cut out to forma slot ,'I substantially midway the lengthof, the head and at opposite sides of this 'slot' the head is `cut to form recesses 8 and 9 which are flush with a side face of the web 3 'Vf of `the body and constitute seats to receive a stationary jaw IU and a movable jaw Il. The two jaws t flat against the Web of the body and are secured by bolts I2 and I3 and each jaw has itsy ledge face presented toward the slot I formed l with teeth Illa and I la so that a drill set in place between the jaws may be very firmly gripped and prevented from slipping or turning after it has been gripped by the jaws. The opening in the. jaw I Uthrough which the bolt I2 passes may be circular and of such diameter that it will snugly receive the bolt I2, but the opening l@ formed in the jaw'II must be elongated transversely of the jaw so that this jaw may be slid transversely from the retracted position shown in Figure 2 Atoward the jaw Ill to an extended position in whichit movesy partially across the slot 'I and Causea drill to be very irmly gripped between the two jaws.' The jaw I0` may also be formed with an opening elongated transversely of the jaw'if'so desired and thus allow either jaw to beused as a movable j'aw when assembling the device. Before the .bolts are applied, a metal strip I5 isdisposed longitudinally of the body against outer side faces lof the two jaws, and when the nuts' of the bolts are tightened this'strip or plate If5'will serve very effectively to hold the jaws inthe recesses and guide sliding movement of'the movablel jaw toward and away `,from the stationary jaw; f

When the `bitof a drill is v,to be removed, the

drill is placed longitudinally of the foundation 5 with th-e end carrying the bit seated in the slot 1 between the two jaws and its other end resting upon the upper edge of the upstanding ange I6 of a strip of angle metal I'I' which is secured upon the upper face of the foundation 5 transversely thereof by bolts or equivalent fasteners I8.

A bar I9 extends longitudinally of the foundation with its forward` end; portion passing through aligned slots formed in the strip I5; and the web of the body I, and since the side edge 20 of the u toward its initial position after each blow delivforward portion of this bar' extends diagonally, it

constitutes a cam surface for engaging the, mov-.v-

ered by the sledge hammer.

In view of the fact ithatz thelworkman is in a standing position and shifted forwardly. The rear end, portiorcof,l1-heg` bar i9 is formed with forks 2I which are spaced A ings 21 formed through the forksI 2| and a Cotter` lrey 23 thenV applied toprevent the boltl from accidentally slippingl out of place through the 'forks' and the arm` of the lever. The openings 2'It are spaced from each other longitudinally of the forks, thus allowing the bar I9 to bex longitudinally adjusted in accordance with thegnecessaryv longitudinal movementr of thel bar to effect tightV gripping engagement off' the jaws withl the drill. The-rear portion of the lever is widened, as shown 'atA 23 in' Figure 2, so that' after a drill has been'set in place` at rest uponthe flangeI of' thefcross 'bar if?" with its front end portion disposed between the jaws, the workman may place a foot upon the widened end portion of the lever and apply down ward pressure to swing the lever about its' pivot` 2'2 and shift the bar forwardly a suliicient: ds- ,A

tance to cause the drill to be, firmly gripped between the two jaws.

rZChe bit to be removed projects from the fron end of the drill.' and this `bit passes through a. recess El! formed transversely in a bit engaging member Si; This bit engaging member or block. extends vertically and at the lower end oi the recess 36 is` .formed with a. tongue 32 whichlprojects transversely vfrom the bit engagingmemher and wl extend under the bit.. An. openingl 33 is. formed through thelower end o thebitengaging, member or block. 3| to receive the threadedstexn 3.4 of a rocker bar 35.. This rocker. ban extends. longitudinally ot thev body i, at. the opposite sideot the web. from. the jaws. lit and. IiIA and mid-Way its length is formed, with a sleeve 36 throughwhich the bolt I3. passes, to. pivotally mount the: rocker bar.y A spring 31., whichhasits. lowerrendl anchored to a clipl 331 fixed tol the base 2.0L the. body i. by a screw S9, has its upper end: engaged through an opening #il formed through the rear end ofv the rocker* bar sothat the front end-.of rocker bar and the lock 3i will be urged up wardly and the tongue 3'2- and thefbottom ot the recess 3E' held inA engagement withxtheportion of the bit passing through the recess. After the drilli has, been secured' between the jaws with its bit extending throughl the recess 3B and resting upon the tongue the workman stands overu the holder and strikes; thetrent; side1 face of the` upper portion of the block with a Sledge hammer. This causes the block orbit 4engaging member drawings.

strikes the block or bit engaging member with a Sledge hammer having a long handle, there will he no danger et. sparks flying from the bit or the bit engaging member lodging in the workmans eye: After the bit has lbeen loosened and withdrawn from the drill, the lever 23 is swung upwandly tolwithdrawthe bar. I9 and thus release the'. n'zoivable` jaw` sol that it may be. shifted away. from thestationary jawand the'drill be removed; The denicemaynthen be put away until again needed. v

lit is thought that-'persons skilled'inthe art to. which'the'inventionrelateswill' be able to obtain a clear understanding' of the invention after considering the1 description ihconn'ection with'the'l Ifheretere, a more vlengthy descriptionl is regardedfasunnecessary.

Minor changes in the shape, size and arrangev ment of details'comingf within' the held of invention claimed maybe resorted 'toin' actual-'prac- 'f' tice', if desired.

`IIa-vingthus described the invention, what lis cl'aiinedis:

1. Afdevice for removinga drill bit comprising mediate it's length with a' transversely extending slot-and at one-side oi the web being formed with recesses leading' vfrom the slot longitudinally'of thehead, jaws disposed vertically against th'ewc'b with upper portions in thet recesses, astrip eX- t towardand? awlay4 fromthe stationary jaw, a

rocker bar pivotally mounted upon the bolt pass-i through them-ova-bl'e jaw at the opposite side of the web from the movableijlaw; saidr rocker bari extending longitudinally' of said body and having a front end portion bent to form astem project-y ing laterally from thel body, a blockpivotally mounted, upon; said stem andy extending upwardly therefrom and formed with a recess extendingv transversely thereoi and' with av tongue extending s laterally from the block flush with thelbottom of the*` recess, a spri-ngf engagingr the rear end'of the rocker bar for tilting the4 rocker bar about its pivot.A and* urging the forward end of the rocker bait-and. the block upwardly, andr means for' mov inghe movablejawtoward the stationaryjaw to grip a drill disposed between the jaw through.

the; slotof the body' and hold the drill firmly in the recess ofi saidbl'oclaf i y 2.. A; drill; bit removing .device comprising. a-

place Witni a. bit of the drillaextendingI throughfoundation, 'az body-*mounted upon, said foundation" and having an upstanding web and a head along the upper edge of the web projecting laterally therefrom, said head being formed intermediate its length with a slot and with recesses leading from the slot longitudinally of a projecting portion -of the head, jaws disposed vertically against the web with their upper portions in the recesses, one jaw being a stationary jaw and the other being movable toward and away from the stationary jaw into and out of a gripping position, a rocker bar extending longitudinally of said body and pivotally mounted at the other side of the web from the jaws, said rocker bar having a front end portion formed with a stem projecting laterally from the web, a bit engaging member pivoted upon said stem and projecting upwardly therefrom and formed with a transversely extending recess and with a tongue projecting laterally from the bit engaging member at the bottom of the recess, spring means yieldably holding the rocker bar in a normal position and resisting downward movement of the forward end portion of the rocker bar, and means for moving the movable jaw toward the stationary jaw for gripping a drill and firmly holding the drill between the jaws with a bit of the drill extending through the recess of the bit engaging member, whereby blows may be delivered to the upper portion of the bit engaging member to dislodge the bit from the drill.

3. A drill bit removing device comprising a base, a body carried by said base and formed with a passage for receiving a portion of a drill and with recesses leading from the passage at opposite sides thereof, jaws in said recesses, one jaw being movable toward and away from the other into and out of a gripping position, a rocker` bar pivoted to said body opposite the jaws and having one end provided with a stem projecting laterally from the body, a bit engaging member pivotally mounted upon said stem and projecting upwardly therefrom and formed with a bit receiving recess whereby, upon striking the upper portion of the be dislodged from a drill gripped between the jaws, and means for moving the movable jaw into position for gripping a drill between the jaws.

4. A drill bit removing device comprising a foundation, a body mounted upon said foundation and formed Lwith a passage intermediate the width of the foundation for receiving a drill, jaws at opposite sides of said passage, one jaw being movable toward and away from the other jaw into and out of a gripping position, a rocker bar pivotally mounted at the other side of the body from the jaws, a bit engaging member pivoted to said rocker bar in position for engaging a bit transversely thereof and loosen the bit when blows are struck against the bit'engaging member, a bar of angle metal mounted across said foundation in longitudinally spaced relation to said body, a flange of the angle bar being disposed vertically and having a stem projecting from one end, a lever pivoted upon the stem of said bar and having a downwardly extending front end portion, and a bar pivoted to the downwardly extending end of said lever and extending longitudinally of said foundation with its free end portion slidably passing through the body and formed along one side edge with a cam surface engaging the movable jaw to shift the movable jaw to a gripping position when the bar is shifted longitudinally of the foundation toward the body.

SAMUEL H. MALINAK.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Number Name Date 368,273 Berger Aug. .16, 1887 979,967 Koeberle Dec. 27, 1910 1,507,585 Cook Sept. 9, 1924 1,507,621 Perry Sept, 9, 1924 1,983,692 Calley Dec. 11, 1934 2,031,814 BedfordI Feb. 25, 1936 2,217,152 Bedford Oct. 8, 1940 2,433,152 Patnaude Dec. 23, 1947 

